Modeling Resilient Modulus of Unsaturated Subgrade Soils under Concurrent Changes in Water Content and Temperature
Modeling Resilient Modulus of Unsaturated Subgrade Soils under Concurrent Changes in Water Content and Temperature
复制标题
含水量和温度同时变化下非饱和路基土的回弹模量建模
DOI：
10.1061/9780784484036.037
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Vahedifard, Farshid
中科院分区：
文献类型：
--
作者：
Abdollahi, Masood;Vahedifard, Farshid
季节变化和气候事件引起浅层非饱和土壤含水量和温度的波动。这种波动会改变路基的回弹模量（MR），这是一个重要的参数，在路面的设计和评价。本文提出了一个新的模型，以确定非饱和路基土的MR在含水量和温度同时变化。拟议的分析模型提供了以下两个新特征，将其与替代模型区分开来：（1）该模型分别考虑了土壤水分的两种不同持水机制，即毛细持水和吸附持水，使其能够在较宽的吸力范围内预测土壤水分的持水率，（2）在MR的计算中，通过采用温度-基质吸力和土壤水分保持曲线的相关表达式。该模型显示出较高的精度时，对实验测量MR值几种不同的土壤在文献中报道的验证。所提出的模型简单，可用于确定含水量和温度同时变化的路基土的MR。
Seasonal variations and climatic events cause fluctuations of water content and temperature in shallow unsaturated soils. Such fluctuations can alter the resilient modulus (MR) of subgrade, which is an important parameter in the design and evaluation of pavements. This paper presents a new model to determineMRof unsaturated subgrade soils under concurrent changes in water content and temperature. The proposed analytical model offers the following two new features distinguishing it from alternative models: (1) the model separately accounts for two different soil water retention mechanisms, namely capillary and adsorption, which enables it to predictMRover a wide range of suctions, and (2) it explicitly incorporates the effect of temperature in the calculation ofMRthrough employing temperature-dependent expressions for matric suction and the soil water retention curve (SWRC). The proposed model showed high accuracy when validated against experimentally measuredMRvalues for several different soils reported in the literature. The presented model is simple and can readily be employed in practice to determineMRof subgrade soils under concurrent variations of water content and temperature.
影响因子：
3.7
作者：
M. Abdollahi;F. Vahedifard
通讯作者：
M. Abdollahi;F. Vahedifard
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
A. Sawangsuriya;T. Edil;C. Benson
通讯作者：
C. Benson